Android cmake 多 cpp 引用问题

[windydy]

我在 ndk 开发时，多 cpp 在主函数引用时，编译报错；调试了很多天，貌似配置什么的都没有问题啊，菜鸟请教一下：

Build command failed.
Error while executing process /Users/mythwind/Library/Android/sdk/cmake/3.6.4111459/bin/cmake with arguments {--build /Users/mythwind/Learn/Android/democode/TestNdk/app/.externalNativeBuild/cmake/debug/armeabi-v7a --target native-lib}
[1/3] Building CXX object CMakeFiles/native-lib.dir/src/main/cpp/native-lib.cpp.o
[2/3] Building CXX object CMakeFiles/native-lib.dir/src/main/cpp/opengl/GLFilter.cpp.o
[3/3] Linking CXX shared library ../../../../build/intermediates/cmake/debug/obj/armeabi-v7a/libnative-lib.so
FAILED: : && /Users/mythwind/Library/Android/sdk/ndk-bundle/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang++  --target=armv7-none-linux-androideabi23 --gcc-toolchain=/Users/mythwind/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64 --sysroot=/Users/mythwind/Library/Android/sdk/ndk-bundle/sysroot -fPIC -isystem /Users/mythwind/Library/Android/sdk/ndk-bundle/sysroot/usr/include/arm-linux-androideabi -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -mthumb -mfpu=neon -Wa,--noexecstack -Wformat -Werror=format-security -std=c++11 -std=c++14 -std=c++11 -fno-rtti -fno-exceptions -Wall -O0 -fno-limit-debug-info  -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a -nostdlib++ --sysroot /Users/mythwind/Library/Android/sdk/ndk-bundle/platforms/android-23/arch-arm -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--fix-cortex-a8 -Wl,--exclude-libs,libunwind.a -L/Users/mythwind/Library/Android/sdk/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libnative-lib.so -o ../../../../build/intermediates/cmake/debug/obj/armeabi-v7a/libnative-lib.so CMakeFiles/native-lib.dir/src/main/cpp/native-lib.cpp.o CMakeFiles/native-lib.dir/src/main/cpp/opengl/GLFilter.cpp.o  -lGLESv3 -llog -landroid -lEGL -llog -latomic -lm "/Users/mythwind/Library/Android/sdk/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a/libc++_static.a" "/Users/mythwind/Library/Android/sdk/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a/libc++abi.a" "/Users/mythwind/Library/Android/sdk/ndk-bundle/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a/libunwind.a" "-ldl" && :
/Users/mythwind/Learn/Android/democode/TestNdk/app/src/main/cpp/native-lib.cpp:38: error: undefined reference to 'GLFilter::initFilter(_JNIEnv*, AAssetManager*)'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.

CMakeLists.txt 代码：

cmake_minimum_required(VERSION 3.4.1)

# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.

set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -fno-rtti -fno-exceptions -Wall")
if (${ANDROID_PLATFORM_LEVEL} LESS 12)
  message(FATAL_ERROR "OpenGL 2 is not supported before API level 11 \
                      (currently using ${ANDROID_PLATFORM_LEVEL}).")
  return()
elseif (${ANDROID_PLATFORM_LEVEL} LESS 18)
  add_definitions("-DDYNAMIC_ES3")
  #set(GL3STUB_SRC gl3stub.c)
  set(OPENGL_LIB GLESv2)
else ()
  set(OPENGL_LIB GLESv3)
endif (${ANDROID_PLATFORM_LEVEL} LESS 12)

file(GLOB native_srcs "src/main/cpp/*.cpp" "src/main/cpp/opengl/*.cpp")

add_library( # Sets the name of the library.
             native-lib

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
             ${native_srcs}
             )


# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.

find_library( # Sets the name of the path variable.
              log-lib

              # Specifies the name of the NDK library that
              # you want CMake to locate.
              log
              android

              )

# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.

target_link_libraries( # Specifies the target library.
                       native-lib
                       ${OPENGL_LIB}

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib}
                       android
                       EGL
                       log
                      )

nativ-lib.cpp如下：

extern "C"
JNIEXPORT void JNICALL
Java_com_vincent_mythwind_testndk_ndk_JniInterface_nativeInit(
        JNIEnv *env, jobject instance, jobject assetManager) {
    AAssetManager *manager = AAssetManager_fromJava(env, assetManager);
    if (manager == NULL) {
        LOGE("=====jniinterface.AAssetManager is null");
        return ;
    }
    if (mFilter) {
        delete mFilter;
        mFilter = NULL;
    }


    LOGE("======nativeInit: filter");
    //mFilter->initGL(env, manager);
    mFilter->initFilter(env, manager);
    LOGE("======nativeInit");

}

GLFilter.h 代码：

#ifndef TESTNDK_GLFILTER_H
#define TESTNDK_GLFILTER_H


extern "C" {
#include <jni.h>
#include "android/asset_manager.h"
#include "android/asset_manager_jni.h"
}

class GLFilter {

public:
    void init();
    void initFilter(JNIEnv *env, AAssetManager *manager);

};


#endif //TESTNDK_GLFILTER_H

GLFilter.cpp 代码：
#include "GLFilter.h"
#include "../Const.h"

void initFilter(JNIEnv *env, AAssetManager *manager) {

LOGE("=========GLFilter.initFilter=========");

}

[windydy]

先自己定一下